Upon clients request we have some service panel specially manufactured. It is like a normal power panel but has some special socket outlets (industrial and general purpose type) installed on its front face/plate. 

Within this service panel, there is a main panel for incoming supply which is further distributed to the socket outlets through their own branch breakers. In order to have flexibility, the panel manufacturer employed fire resistant cables (instead of flexible busbars) between the branch breakers and the socket outlets. 

The consultant on the project is rejecting the material saying that those internal cables should be low smoke zero halogen because the specs for the project calls for all internal cabling and wiring of the building to be LS0H. 

I will appreciate your thoughts on this, is the consultant right to reject the material? For my own opinion those cables are just like busbars and they do not need to be LS0H necessarily.